i'm using Autosync to backup my files on my NAS every day. It doesn't require Root therefore it can't create "real" backups that you could restore from. It can only copy the files from your Phone; Pictures, Files, etc.
Currently have 2x8TB & 2x18TB in a ZFS vdev config on TrueNAS. So usable space is ~22TB and i store everything i load on there until it's really really not important anymore.
Fantastic choice.
I'm in Garuda for over a year now and never looked back!